Products by Chugai Match Co., Ltd. are "sulfurless matches."
Sulfur is not applied to the head of matches.
|When striking a match containing sulfur, a strong pungent odor is generated.
This is "sulfurous acid gas" which is generated when sulfur is
Continuous inhalation of this gas as concentrations as low as 0.015ppm
can trigger an asthma *¹.
Knowing this Chugai Match repeatedly conducted research considering users'
health, succeeded in production of sulfurless matches, and obtained a process
patent for sulfurless matches.
When striking a sulfur free match, a soft flame flickers, giving a feeling
of security to the user.
"Sulfur free matches" = "Sulfurless matches"
*1 As of 2007, environmental standard of sulfur dioxide under the Basic
Law for Environmental Pollution Control in Japan is daily average of hourly
value is 0.04ppm or less and an hourly value is 0.1ppm or less.
Nitro-cellulose is not applied to the head of matches.
Nitro-cellulose may be used as a raw material of matches instead of sulfur.
Nitro-cellulose generates nitrogen oxide when combusted.
Chugai Match does not use nitro-cellulose.